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Does it cut out at 3000 rpm in ANY gear, or just at highway cruise in high gear? I ask this because what can happen is that if you spend a lot of time cruising at one speed (long-distance commuter, over-the-road driver), what can happen is the the TPS (throttle position sensor) will get a dead spot on it from excessive wear. This will cause bucking, drop-offs, a stuttering whenever you happen to hit the dead spot. Typically, timing or ignition-type problems are not going to be rpm dependent, although they may be felt more prevalently a certain speeds/rpms. Transmission issues usually occur at shift points, and not at cruise speeds.
Many of the older vehicles do this and is in essence not a problem. Due to the age of the vehicle the in and/or outlet valves do not seal perfectly causing this puffing. To get rid of it the cylinder head must be removed and the valves need then to be seated again. Costly and unnecessary. Rather check if the tappets are set correctly as this also can cause it. However!! if the tappets are to be found to be set incorrectly it must be rectified immediately as this can cause damage to the valve seats that will result in cylinder head removal -cylinder head overhaul. If every thing checked out fine there is a not so elegant and completely at your own risk option. Take the vehicle out to an open road (Low traffic) Gear up to third gear , increase speed to reach high engine rpm but still driving slow. About 5000 rpm will do. More is OK but please not so high that the engine blows. Maintain this for about half mile and thereafter drive normally for another half mile to cool the engine down. This is done in effort to rid the engine of carbon built-up in the engine and around the valve stems. Sometime it does help and worth a try. High engine rpm is the key but take note excessive high rpm will damage the engine.
Have you checked the PCV system?? If its stuck in the closed position then you will lack power and turbo boost. A vehicle needs 3 things to make it run proper; FUEL,FIRE and AIR. Try that and see if it helps.
Not sure I am following your story. Are you saying the transmission is slipping and therefore the RPM is high even tho the road speed is not ? Or is the transmission not upshifting to the next gear at a normal road speed ? Is the check engine light on ?
That is not recommended, as it could cause transmission damage. Since you have a VTEC you should get a power boost at around 5000 rpm which should make climbing hills easier and not need a shift of the transmission.
First I need to ask is it a 4 speed or a 3 speed transmission. If it's a 4 speed when driving down the road pull it from drive to third gear. You shpuld hear the engine speed up if it does not then that means you have on 4th gear and you will have to take it to a transmission shop. If it's a 3 speed then just count the shift points if all 3 gears are present then drive down the road and see if the van goes into tcc. When you mean the rpms are high how high are they.
That is normal,If you do the same speed in 4th gear the rpm's will almost double.
The rpm's will repond faster in a manual than an automatic.
In a manual the engine supplies the power required directly to the gear that you have selected thus the engine rpm's will increase or decrease as needed.
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